Paytm Mobile Solutions — Booking of international flight tickets

I booked Delhi to Tel Aviv flight with ref no : [protected] by booking is initially accepted and when money got deducted they said booking failed. I contacted customer care and they said airline declined it because there might not be any seats and when I contacted airline they said we never deny these things and there are plenty of seats. My refund is also stuck as they are saying it will take 7-14 working days to do it and by the time it will come price will go up by 5-10 thousands. Basically paytm has taken my money for fun. Secondly Its a sort of fraud also because you should inform us that these things might happen at start of booking not when everything is over.